Date: Wed, 02 Nov 2005 02:26:18 -0800 From: ray@redshift.com To: Michael VInce <mv@roq.com>,Steven Hartland <killing@multiplay.co.uk> Cc: freebsd-performance@freebsd.org Subject: Re: SATA: RAID 5 controller recommendations Message-ID: <3.0.1.32.20051102022618.00a73dc0@pop.redshift.com> In-Reply-To: <4368921C.40305@roq.com> References: <000801c5d434$579de280$b3db87d4@multiplay.co.uk> <000801c5d434$579de280$b3db87d4@multiplay.co.uk>
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At 09:17 PM 11/2/2005 +1100, Michael VInce wrote: | For SATA I have always been getting the Dell 750s (now 850s) which use | the 'aac' | Adaptec AdvancedRAID Controller driver, do 'man aac' for more details. | Dell supply them with a 64meg cache and are hardware raid, I have always | just installed FreeBSD on them and only 1 hard drive comes up as RAID | should be. | | I have only been ordering the machines in dual drive mirror 1 Raid, but | you could get a PowerEdge Tower servers like the 830 which do raid 5, I | never used one though. | Alternatively all the Dell SCSI RAID systems have 256megs cache which | use the LSI Logic MegaRAID ( man amr ) | Stay away from the ultra low end SC1425 systems they have some kind of | software based raid. | | The thing I have noticed is that if you compare other (often claiming to | be much cheaper) servers from other companies they often really skimp on | their hard drive subsystems with software based stuff claiming its RAID. | | I used to be anti Dell and build my own U1 servers from case and up and | had a keen interest in cheap RAID technologies but I gave up a little | while ago. | I believe Dell are great value when you consider their RAID | implementations and as long as you are happy with Intel chips. | | Mike | | Steven Hartland wrote: | | > Anyone got any SATA RAID 5 controllers they can recommend | > 64Bit PCIX. | > | > Steve Steve - 3ware is very good. Mike - I have some benchmarks from a guy using a Dell with a raid and was surprised to see how slow they were compared to our other hardware. I didn't run them myself, but the guy is on the list here some place. I can send you a copy of the spreadsheet if you want to look it over. Ray
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